Trap-door, skylight, and roof-ventilator.



PATENTED NOV. 13, 19 06.

F. LYSTER.

TRAP DOOR, SKYLIGHT, AND ROOF VENTILATOR.

APPLIOATION FILED MAR. 8, 1905 2 SHEETS-SHEET 1.

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v IIVVE/VTOH C? fij j wg LK ivy o Gurwan/M416- ATTORNEY PATENTED NOV.13, 1906.

F. LYSTER.

TRAP DOOR, SKYLIGHT, AND ROOF VENTILATOR.

APPLICATION FILED MAR. 3. 1905.

2 SHEETS-SHEET 2,

WITNESSES: V QMZW doors.

,tors may be constructed of sheet metal or FRANK LY-STER, OFPHILADELPHIA, PENNSYLVANIA.

TRAP-DOOR, SKYLIGHT, AND ROOF-VENTILATOR.

Specification of Letters Patent.

Patented Nov. 13, 1906.

Application filed March 8, 1905. Serial No. 248,210.

To all whom it may concern.-

Be it known that I, FRANK LYSTER, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented a new and useful Trap-Door, Skylight, andRoof- Ventilator, of which the following is a specification.

This invention relates to improvements in means for securing ventilationin trap-doors, skylights, roofs, and similar constructions. Its objectsare to effect improvements in means for ventilation whereby theventilaother material efl'ectually'braced to provide for ample strength,yet of light Weight and economical construction.

Another object is to afford a construction which shall effectuallyprevent the entrance of rain or snow to the interior of the ventilator,the joints between it and the arts to which it is attached, and to theiiuilding below.

Further objects are to provide such improvements as will allow for freeventilation and in the provision for condensation of moisture.

I attain these objects by the combination, construction, andarrangements of parts hereinafter fully described, and shown in thacoomp anying drawings, in which Figure 1 is a perspective view,partially in section, of roofs having my improvement inridge-ventilators thereon. Fig. 2 is a sectional view, partially inperspective, of one form of ventilator. Fig. 3 is an alternative form ofconstruction of the same, showing the deflecting-plates and angularinner stormguard. Fig. 4 is an arched form of ventilator with interiorgutter, providing for the condensation of moisture and leakage. Fig. 5shows my invention as applied to trap- Similar characters refer tosimilar parts throughout the several views.

These ventilators are preferably constructed of non-oxidizable thinsheet metal bent into any approved shape, as indicated by the character1, which refers to a fanciful form thereof, or as at 1 and 1 which is acommon form thereof, or as at 1 which indi cates an arched ordome-shaped covering.

2 refers to the downwardly-extending members, which may be furtherturned laterally inward, as at 3 in Fig. 2, or extended farther out, asat 4 in Fig. 3, thence vertically downward and then laterally inward, as

at 3 in Fig. 3, or at 3 in Fig. 4, or again at 3 in Fig. 1. Thesemembers or webs 3, 3, 3 and 3 are provided with perforations 5 to allowfor the free exit of air from the inside of from entering into thebuilding. The said flanged members 6 and 7 are preferably sweated orotherwise united to the metal roofing, forming means of support for theventilator.

Further means of securing and bracing the ventilator are provided forbythe plates 8, secured at their lower ends to the roof-supports andhaving their upper ends lapped to form the dutched edge 9.

In some cases I make use of an auxiliary moisture-deflecting plate 10 tocheck the aircurrents of moisture and effectually carry off the same, asshown particularly in Fig. 3.

In F i 4 the material of the roof is carried vertical y upward to form adeflecting-plate, bent double upon itself, with a dutched edge, as at 11carrled downward past the Woodwork at 12 of the roof, bent outwardly inregister with it, doubled upon itself and secured to the inner side ofthe roof, as at 13.

From thence it is turned downwardly, forming the sides 16 and 16 of atrough or gutter 14, having an imperforate bottom 15.

The upper portion of the gutter sides 16 and 16 have perforations 17 and17 a to allow for the free egress of air from the building. By this formof construction should an moisture have entered the ventilator it willbe caught in the gutter and carried out of the building, the said gutterbeing connected with the exterior of the roof.

The view, Fig. 1, shows a special form of angular roof construction, inwhich the material of the ventilator is extended from one roof toanother and underlaid with slate 0 other roofing material.

It will be understood from the description hereof that I may vary themode of construction and application thereof, but without departing fromthe general spirit of the -in- -vention, as will be well understood bythose ent, is--- 1. In a ventilator, the combination with anon-oxidizable top coverin flanges depending'therefrom and inwar,y-extending perforate members, vertical members therefrom havingoutwardly-turned flanges adapted to be attached to the roof-covering; ofoutwardly-turned angular deflectinngates within the said ventilator andof rei orcing-stri s uniting the ventilator to the roof, all s11stantially as shown and described.

2. In a ventilator, the combination with a non-oxidizable top covering,of depending flanges therefrom, inwardly-extending members theretoprovided with perforations, vertical members therefrom andoutwardlyssaeee i turned flan es attached to the roof-covering,

deflecting-p ates within the said ventilator, auxiliarydeflecting-plates extending outwardly from the main deflecting-plates,and strengthening members further uniting the roof with the saidventilator, all substantially'as shown and described.

3. In a tra -door for roofs, the combination with a oorin having openspaces at intervals therein, o a non-oxidizable, metallic covering forthe said openings, having means of ventilation and moisture-excludingplates arran ed interior-1y, all substantially as shown an described.

In testimony whereof I have signed myname to this specification in thepresence of two subscribing witnesses.

' FRANK LYSTER. Witnesses:

LOUIS VON GRAEVE, ROBERT K. PERKINs.

